Former President George W. Bush walks off Air Force One carrying the family pets Barney, right, and Ms. Beazley as he arrives at Andrews Air Force Base, Maryland on Aug 13, 2006.

Former President George W. Bush walks off Air Force One carrying the family pets Barney, right, and Ms. Beazley as he arrives at Andrews Air Force Base, Maryland on Aug 13, 2006. (Jim Watson, AFP/Getty Images)